Superheater arrangement



Oct. 18, 1932. c, w, GORDON I 1,883,705

I SUPERHEATER ARRANGEMENT Filed Feb. 27. 1930 4 I: Sheets-Sheet l TIEZLINVENTOR (13.7165 W. Gard on,

his A TTORNE V Oct. 18, 1932. c. w. GORDON 1,883,705

SUPERHEATER ARRANGEMENT Filed Feb. 27. 1930 5 Sheets-Sheet 2 INVENTORCharIesW. Gord n Q Ms A TTORNE y Oct. 18, 1932. c w, GORDQN 1,883,705

SUPERHEATER ARRANGEMENT Filed Feb. 27. 1950 3 Sheets-Sheet 3 INVENTOR,Charla; WGaw-Jon,

Q If M his A TTORNEY Fatented Oct. 18, 1932- UNITED STATES CHARLES W.GORDON, OF PLEASANTVILLE, NEW YORK, ASSIGNOR TO THE HEATER COMPANY, OFNEW. YORK, N. Y.

PATE T OFFICE SUPER- SUIPERHEATER ARRANGEMENT Application filed February27, 1930. Serial No. 431,783.

My invention relates to arrangements of superheaters in boilers and hasas its principal object to provide means whereby changes of position ofthe boiler with changes in temperature will not harmfully stress a.

superheater closely associated therewith.

In the ordinary water-tube boiler installation, the boiler is suspendedfrom beams above the roof of the boiler. When a superheater is used, itis often suspended within the boiler intermediate two banks of tubes.When steam is raised in such an installation, the increasing temperatureof the boiler parts causes it to sag. The superheater headers, on theother hand, are usually carried on fixed supports and, even if springsupported, can move relatively little in the vertical direction. It isusually necessary that the tube ends between the active or heatabsorbingsections of the superheater elements and the headers must passthrough internal baffies or outer walls of the boiler. It is undesirablethat the combustion gases should pass through such walls, but if thewalls and bafiles have been made to fit the tube ends closely enough toprevent leakage at the points such ends pass through them, the relativemovement of the boiler and superheater parts has damaged thesuperheater. or the boiler wall or baflle.

It is a particular object of my invention to provide means forovercomingthe foregoing dificulty.

Two specific arrangements embodying my invention are illustrated indetail in the accompanying drawings. In order that the invention may beclearly and readily understood, a detailed description of the saidembodiments will now be givenin connection with the accompanyingdrawings and the features of novelty pointed out in the appended claims.In said drawings,

Fig. 1 is a sectional elevation on the longi-,

tudinal plane of a boiler installation having an interdeck superheaterand embodying my invention; Fig. 2 is a fragmentary section taken on theline 22 of Fig. 1 looking in the direction of the arrows; Fig. 8 is afrag.

mentary sectional view looking from the right of Fig. 2, one of thevertical tubes of 2 being omitted and parts being broken away I forpurposes of illustration; Fig. 4 is a sectional View on the line 4-4 ofFig. 2looking inthe direction of the arrows; Fig. 4a is a detail of aplate shown in Fig. 2; Fig. 5'is a fragmentary sectional view on theline 55 of Fig. 6, looking inthe direction of the arrows; Fig. 6 is afragmentary detail elevation of the section of the internal battle ofthe boiler shown in Fig. 1 and through which the superheater elementsextend; Fig. 7 is a sectional view on the line 7 7 of Fig. 6 looking inthe direction of the arrows; and Fig. 8 is an expanded view inperspective of a portion of Fig. 6.

In the arrangement shown in the drawings, 10 indicates in general aboiler of the well-known cross drum, straight tube type having a'lowerbank of generating tubes 12 and an upper bank of generating tubes 14spaced apart to provide a chamber 16 for an interdeck superheater 15.'In the arrangement shown, superheater'lS-has two headers 20 and 22,header 20 lying along one of the outer walls of the boiler and header 22lying along an inner vertical baflle 24 of the boiler. The tube elementsof superheater '18 are shown as supported from the tubes of bank 14 byhangers 26, 26, a known arrangement. 1

It will be seen that the connecting tube ends between the headers andthe active sections of the elements of superheater 18 must pass throughthe wall 27 covering the water and steam carrying tubes or boilercirculator nipples 28 at one end of the boiler and through the internalbafile' wall 24 in order to reach the headers 20 and 22 respectively.

It is highly desirable that no leakage of gases occur at the pointswhere the superheater tubes pass through wall 27 and through the baffle24. However, if an inflexible closure is made at these points, leakageof gas'can be prevented only at the expense of stress-.

ing stressing of the superheater elements or the wall 27 at the pointswhere the elements pass between the nipples 28. In Figs. 5, 6 and 7 isshown in detail an arrangement in accordance with my invention foraccomplishing the same objects at the points where the superheaterelements pass through the internal baflle wall 24.

Referring more particularly to Figs. 2, 3, 4 and 4a, and 32 are two tubeends for connecting active sections of the superheater elements with theheader 20. It will be evident from Fig. 1 that the tube ends 30 and 32connect to elements of superheater 18 which lie in parallel verticalplanes, but as appears clearly in Fig. 2, the tube ends 30 and 32 arebrought one above the other at the points where they pass between theadjacent nipples 28. At such points where the tube ends pass throughwall 27, a section of the wall 27 is removed to provide space forinstalling a flexible non-leaking joint in accordance with my invention.As illustrated, two sets of plates 34, 34a and 36, 36a are provided foreach joint and are clamped to opposite faces of a pair of adjacentnipples 28 at points about 120 degrees apart on the surfaces of thenipples. Plates 34, 34a and 36, 36a are beveled as shown at 38, 38, toprovide bearing surfaces between the plates and nipples 28 and each pairof platesis drawn together and thereby clamped to a pair of nipples 28by means of bolts 40, 40 extending from plate 34 to plate 34a andbetween plate 36 and plate 36a. As shown, the heads of the bolts and thenuts therefor are received into the plates in recesses 41, 41 closed atthe back by lugs 42, 42 on the rear faces of the plates so that the nutsand the heads of the bolts need not project beyond the outer surfaces ofthe plates. The horizontal edge of plate 34 is set close to that ofplate 36 so that plates 34 and 36 when in place form in effect oneplate. Similarly, plates 34a and 36a lie in the same plane and form,when installed, one plate. Running each way along the vertical edges ofplates 34 and 36 from the meeting line between the two, are outstandingflanges 44, 44, one pair on opposite sides of plate 34 and one pair onopposite sides of plate 36. The flanges 44 are bent inwardly as shown at46, 46 (Fig. 4) to provide grooves 48, 48 for receiving the verticaledges of companion plates 50, 50. Plates 50 run vertically on oppositesides of the tube ends 30 and 32 and are notched to receive such tubeends, plates 50 having outstanding lugs 52, 52 at their centers wherebythey may be bolted together and clamped to the tube ends 30 and 32. Theplates 34, 34a and 36, 36a are notched out to provide recesses 54, oneof which is illustrated in detail in Fig. When plates 34, 34a, 36 and36a are clamped together as shown in Figs. 2, 3 and 4, the recesses 54are made to form an elongated opening in which the tube ends 30 and 32may-move vertically without striking the edges of the recesses. It willbe seen, however, that the opening formed by the recess 54 in the outerplates 34 and 36 is covered by the plates 50, 50 so that gases cannotpass through. Plat-es 50 are of sufficient size that openings 54 remainclosed both when the boiler is hot and when it is cold. The plates 50,50, however, are free to slide up and down in the grooves 48 relativelyto the plates 34 and 36 so that no stress is put on the superheaterelements by the expansion and contraction of the boiler with changesinteinperature. The space 55 between a pair of tubes 28 and a set ofplates 34, 34a, 36, and 3664 may be packed with asbestos or otherpacking to further insure against leakage of gas through wall 27.

Referring now more particularly to the arrangement the superheater withrespect to the internal bane 24.. I rave illustrated N in figs. 5, 6 anda suitable arrangement L within my invention for preventing leakagethrough the battle. As illustrated, the bafile 24 comprises an intertubesection 24a and an interdeck section 25. As appears 6, the section 25may be ispcnded from metal plates 60, interlocked with the tubes of bank14 lying alongside the refractory baflle section 2454. However, thisfeature forms no part of the present invention. [is shown, the plates 60e prevented from sliding on the tube b 14 by means of clamps 62 andsupport ribs 64 from which are supported in turn cast metal blocks 66,one face of which carries ribs 68 forming recesses in which is placedrerractory material 69. In order to lfilllllil the tube ends to passthrough the bathe section 25, said section. in the arrangement shown iscut away to form a horizontal passage or opening 7 2. Along run theupper and lower edges of the opening 72 in wall 5, means are provided toform grooves 7 4 and 76 respectively, and similar means (not shown) areprovided at the vertical edges of he opening 72 to form verticalgrooves. In order to permit the tube ends to pass through the opening 72without material gas leakage through bafile 24 and without puttingstress upon the tube ends, a slidable door 0 nanel 77 is provided forclos ing opening 72. Panel 77 is formed of blocks 78, 78 which arenotched on their vertical edges to receive the tube ends and which areclamped closely to such ends to prevent passage of gas there along. Theblocks 73 are rabbeteo together at their edges to prevent leakage andextend upwardly and downwardly into the grooves 74 and 76. The edges ofthe grooves 74 and '76 the blocks 78 sufiioiently close to prevent anymaterial leakage of gas around the edges of the blocks. Blocks 78 arepreferably formed with ribs 79 on oneface of panel 77 Y i P Cab holdrefractory 8O thereto. In order to further prevent leakage of gasthrough baflie section 25, ribs 79 may be arranged to follow thecontoursof the notches for ends and provided with packing grooves 81 (Fig. 7) inthe notches for the tube ends 70 to receive asbestos or other packing.

While I have described in detail two arrangements within my invention,it will be understood that the embodiments of my invention shown in thedrawings and described above are illustrative only and that I do notlimit myself to the details of the foregoing disclosure. in paricular, Ido no limit myself to superheaters used between the tube backs of aboiler. In fact, my invention is uselul wherever a part extends througha bafie or other wall with relative motion between it and the wall inthe plane of the battle or wall.

I claim:

1. The combination with a boiler having a plurality of tube banks,circulator nipples and a vertical wall fixed to said nipples of asuperheater intermediate two of said banks, said superheater havingheaders relative to which the boiler structure moves when changingtemperature and having tube ends passing through said wall and arrangedin pairs between pairs of nipples, and means for sealing the point atwhich said ends pass through said wall comprising a plate fixed to apair of nipples and having an opening for a pair or" said tube ends anda plate fixed closely around a pair of tube ends and closing saidopening both when the boiler is hot and when it is cold.

2. The combination with a boiler having a plurality of tube banks,circulator nipples and a vertical wall fixed to said nipples, of asuperheater intermediate two of said banks,

said superheater having headers relative to which the boiler structuremoves when ch anging temperature and having tube ends passsing throughsaid wall and arranged in'pairs between pairs of said nipples, a pair ofplates each in two parts meeting along horizontal lines, means forclamping said plates against opposite faces of a pair of adjacentcirculator nipples, said plates having openings for a pair of said tubeends, a third plate in two parts meeting along a vertical line andclamped to a pair of said tube ends in position to slide over one ofsaid plates, said third plate covering the opening in one of said firstmentioned plates, and means for guiding the vertical edges of said thirdplate and fixed to the plate over which the third plate is movable. i

3. The combination with a boiler having a plurality of tube banks,circulator nipples and a vertical wall fixed to said nipples of asuperheater intermediate two of said banks,

said superheater having headers relative to which said wall moves whenchanging temperature and having tube ends passing and a vertical wallfixed to said nipples of a superheater intermediate two of said banks,said superheater having headers relative. to which the boiler structuremoves when changingv temperature and having a tube end passing throughsaid wall, and means for sealing the pointat which said end passesthrough said wall comprising a plate fixed to said nipples and having anopening for said tube end and a plate fixed closely around said tube endand closing said opening both when the boiler is hot and when it iscold.

5. The combination with a boiler having a plurality of spaced tube banksincluding headers and nipples connecting the headers of two of saidbanks, a superheater intermediate the two of said banks connected bysaid nipples, closure means fixed to said nipples for closing the spacestherebetween, said superheater having headers relative to which saidnipples move when the boiler is changing temperature and having tubeends passing thru said means, and means for sealing the points at whichsaid ends pass thru said closure means comprising plates each fixed to apair of nipples and having openings for said tube ends, and plates fixedclosely around said tube ends and adapted to close said openings bothwhen the boiler is hot and when it is cold. e 1

CHARLES W. GORDON.

